Hi Deeko01
I went to Orlando last year with air2000 into Sanford on the 767 not sure what series though but it was a 2-4-2 config - my partner is 6ft 2 and yes it was a bit cramped for him but I didnt think it was too bad- no worse than any other charter . Worth asking for legroom as we got seats by doors 3 on the return leg and only requested them at checkin at Sanford - just get there early.
Hope you have a great time - Orlando is brilliant however many times you visit